Porous silica nanosheets in PIM-1 membranes for CO2 separation

Mohsenpour, Sajjad ; Guo, Zunmin ; Almansour, Faiz ; Holmes, Stuart M. ; Budd, Peter M. ; Gorgojo, Patricia (Universidad de Zaragoza)

Resumen: PIM-1-based freestanding mixed matrix membranes (MMMs) and thin film nanocomposites (TFNs) were prepared by incorporating porous silica nanosheets (SN) and exfoliated SN (E-SN) derived from natural vermiculite (Verm) in the PIM-1 polymer matrix. In addition, SN were functionalized by sulfonic acid and amine groups (S-SN and N-SN, respectively) and were also used as fillers for the preparation of MMMs. The gas separation performance was evaluated using CO2/CH4 and CO2/N2 (1:1, v:v) binary gas mixtures. Among freestanding membranes, fresh ones (i.e. tested right after preparation) containing 0.05 wt% functionalized SN and E-SN outperformed the neat PIM-1, surpassing the 2008 Robeson upper bound. At the same filler concentration, fresh MMMs with sulfonic acid-functionalized SN (S-SN) exhibited 40% higher CO2 permeability, 20% higher CO2/N2 selectivity and almost the same CO2/CH4 selectivity as neat PIM-1 membranes. Moreover, after 150 days of aging, these membranes were capable of maintaining up to 68% of their initial CO2 permeability (compared to 37% for neat PIM-1). When prepared as TFN membranes, the incorporation of 0.05 wt% of S-SN led to 35% higher initial CO2 permeance and five times higher CO2 permeance after 28 days.

Idioma: Inglés

DOI: 10.1016/j.memsci.2022.120889

Año: 2022

Publicado en: JOURNAL OF MEMBRANE SCIENCE 661 (2022), 120889 [11 pp.]
ISSN: 0376-7388

Factor impacto JCR: 9.5 (2022)

Categ. JCR: POLYMER SCIENCE rank: 4 / 85 = 0.047 (2022) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 11 / 141 = 0.078 (2022) - Q1 - T1

Factor impacto CITESCORE: 16.5 - Materials Science (Q1) - Chemistry (Q1) - Chemical Engineering (Q1) - Biochemistry, Genetics and Molecular Biology (Q1)

Factor impacto SCIMAGO: 1.91 - Biochemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Materials Science (miscellaneous) (Q1) - Filtration and Separation (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/RYC2019-027060-I/AEI/10.13039/501100011033

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)